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How to make the tube rendering more 3 dimensional with Maya?

Posted: March 05, 2013
Hi all,
I've been trying to render some brain fiber tubes for some medical visualization purpose. But I've been told that the tubes are not 3D enough even I rendered them with Maya mental ray GI. The following is one picture that I rendered, you may click to see it in full resolution.
I used three lights: one spot light that is placed at the camera position and casts soft shadows; one spot light on the top and casts soft shadows and one point light on the left that does not cast shadow.
I am not an expert in the realistic rendering. Can anybody tell me how to improve the rendering to make the shape/curvature perception better?

Thank you!

Posted: March 07, 2013
can anyone give me any suggestion? Thank you!
Posted: April 28, 2013
3d artist gallery Andyba
Hi GuohaoZhang,
You can try to increase the camera angle to add more perspective.
Posted: May 05, 2013
3d artist gallery tripoly007
When people are rendering in additional superior excellence designs it doesn’t build no dissimilarity as u tube is just reducing it, and are there several instructions to obtain beyond standard noise taking place u tube to facilitate pro utilize to upload graph songs etc ?and more thanks.